Circuit Documentation

Summary

This circuit consists of multiple rotary potentiometers, a 16-channel analog multiplexer, an Arduino UNO, and a MIDI chassis connector. The potentiometers are used to provide variable resistance, which is read by the multiplexer and then processed by the Arduino. The Arduino also interfaces with the MIDI chassis connector to send or receive MIDI signals.

Component List

Rotary Potentiometer

• Description: A variable resistor with three terminals.
• Pins: leg1, wiper, leg2
• Properties:
  • Resistance: 10,000 Ohms

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

16 Channel Analog Multiplexer

• Description: A multiplexer that allows multiple analog signals to be routed to a single output.
• Pins: GND, VCC, EN, S0, S1, S2, S3, SIG, C0, C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15

MIDI Chassis Connector

• Description: A connector for MIDI communication.
• Pins: 2, 4, 1, 3, 5

Resistor

• Description: A passive electrical component that implements electrical resistance.
• Pins: pin1, pin2
• Properties:
  • Resistance: 120 Ohms

Wiring Details

Rotary Potentiometer

• leg1 is connected to:

  • leg1 of other rotary potentiometers
  • GND of the Arduino UNO
  • GND and EN of the 16-channel analog multiplexer

• wiper is connected to:

  • C14 of the 16-channel analog multiplexer
  • C15 of the 16-channel analog multiplexer
  • C13 of the 16-channel analog multiplexer
  • C12 of the 16-channel analog multiplexer
  • C11 of the 16-channel analog multiplexer
  • C10 of the 16-channel analog multiplexer
  • C9 of the 16-channel analog multiplexer
  • C8 of the 16-channel analog multiplexer
  • C7 of the 16-channel analog multiplexer
  • C6 of the 16-channel analog multiplexer
  • C5 of the 16-channel analog multiplexer
  • C4 of the 16-channel analog multiplexer
  • C3 of the 16-channel analog multiplexer
  • C2 of the 16-channel analog multiplexer
  • C1 of the 16-channel analog multiplexer
  • C0 of the 16-channel analog multiplexer

• leg2 is connected to:

  • leg2 of other rotary potentiometers
  • pin2 of a resistor
  • 5V of the Arduino UNO
  • VCC of the 16-channel analog multiplexer

Arduino UNO

• GND is connected to:

  • leg1 of rotary potentiometers
  • pin 2 of the MIDI chassis connector

• 5V is connected to:

  • leg2 of rotary potentiometers

• A0 is connected to:

  • SIG of the 16-channel analog multiplexer

• D5 is connected to:

  • S3 of the 16-channel analog multiplexer

• D4 is connected to:

  • S2 of the 16-channel analog multiplexer

• D3 is connected to:

  • S1 of the 16-channel analog multiplexer

• D2 is connected to:

  • S0 of the 16-channel analog multiplexer

• D1 is connected to:

  • pin1 of a resistor

16 Channel Analog Multiplexer

• GND is connected to:

  • leg1 of rotary potentiometers
  • GND of the Arduino UNO

• VCC is connected to:

  • leg2 of rotary potentiometers

• EN is connected to:

  • leg1 of rotary potentiometers

• S0 is connected to:

  • D2 of the Arduino UNO

• S1 is connected to:

  • D3 of the Arduino UNO

• S2 is connected to:

  • D4 of the Arduino UNO

• S3 is connected to:

  • D5 of the Arduino UNO

• SIG is connected to:

  • A0 of the Arduino UNO

• C0 to C15 are connected to:

  • wiper of rotary potentiometers

MIDI Chassis Connector

• Pin 2 is connected to:

  • GND of the Arduino UNO

• Pin 4 is connected to:

  • pin1 of a resistor

• Pin 5 is connected to:

  • pin2 of a resistor

Resistor

• pin1 is connected to:

  • D1 of the Arduino UNO
  • pin 4 of the MIDI chassis connector

• pin2 is connected to:

  • leg2 of rotary potentiometers
  • pin 5 of the MIDI chassis connector

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)